On a conventional road with a passable, sufficient shoulder, in daylight and good visibility, may two cyclists ride side by side if traffic flow is unaffected?

Correct answer

Yes.

Yes, under Article 36.2. They must ride single file where visibility is lacking, traffic flow is affected, between sunset and sunrise, or when conditions significantly reduce visibility. Without a passable, sufficient shoulder, the necessary part of the carriageway may be used; on autovías they must use the shoulder, and bicycles are prohibited on autopistas.